85871515 has 4 divisors (see below), whose sum is σ = 103045824. Its totient is φ = 68697208.

The previous prime is 85871503. The next prime is 85871521. The reversal of 85871515 is 51517858.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 85871515 - 2⁵ = 85871483 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8587147 + ... + 8587156.

It is an arithmetic number, because the mean of its divisors is an integer number (25761456).

Almost surely, 2^85871515 is an apocalyptic number.

85871515 is a deficient number, since it is larger than the sum of its proper divisors (17174309).

85871515 is a wasteful number, since it uses less digits than its factorization.

85871515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17174308.

The product of its digits is 56000, while the sum is 40.

The square root of 85871515 is about 9266.6884592070. The cubic root of 85871515 is about 441.1805675245.

The spelling of 85871515 in words is "eighty-five million, eight hundred seventy-one thousand, five hundred fifteen".